DAG representation of a basic block allows __________(a) Automatic detection of local common sub expressions(b) Detection of induction variables(c) Automatic detection of loop variant(d) None of the mentionedI had been asked this question in an international level competition.My question is taken from Handle of Right sentinel Grammar in chapter Bottom Up Parsing of Compiler

DAG representation of a basic block allows __________(a) Automatic det

1.	DAG representation of a basic block allows __________(a) Automatic detection of local common sub expressions(b) Detection of induction variables(c) Automatic detection of loop variant(d) None of the mentionedI had been asked this question in an international level competition.My question is taken from Handle of Right sentinel Grammar in chapter Bottom Up Parsing of Compiler
Answer» The correct OPTION is (a) Automatic DETECTION of local COMMON sub expressions For explanation I would SAY: It DETECTS local sub expression.

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